Separacion de codigo por carpetas, cambio de estilo, clase pregon integrada

lib/bars/app_bar

@@ -0,0 +1,30 @@
+import 'package:flutter/material.dart';
+
+class CustomAppBar extends StatelessWidget implements PreferredSizeWidget {
+  const CustomAppBar({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return AppBar(
+      title: const Text(''),
+      centerTitle: true,
+      backgroundColor: Color.fromARGB(255, 78, 169, 6),
+      flexibleSpace: Container(
+        padding: const EdgeInsets.all(8.0),
+        child: Center(
+          child: Padding(
+            padding: const EdgeInsets.only(top: 30.0),
+            child: Image.asset(
+              'assets/logo-civan.png',
+              height: 150,
+              width: 150,
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+  @override
+  Size get preferredSize => const Size.fromHeight(kToolbarHeight);
+}

lib/bars/bottom_bar

@@ -0,0 +1,43 @@
+import 'package:flutter/material.dart';
+import 'package:url_launcher/url_launcher.dart'; 
+
+class CustomBottomBar extends StatelessWidget {
+  const CustomBottomBar({Key? key}) : super(key: key);
+
+  Future<void> _launchURL(String url) async {
+  try {
+    await launch(url);
+  } catch (e) {
+    // Captura de la excepción
+    print('An error occurred: $e');
+  }
+}
+
+  @override
+  Widget build(BuildContext context) {
+    return BottomNavigationBar(
+      items: const [
+        BottomNavigationBarItem(
+          icon: Icon(Icons.call),
+          label: 'Llamar',
+        ),
+        BottomNavigationBarItem(
+          icon: Icon(Icons.email),
+          label: 'Correo',
+        ),
+      ],
+      selectedItemColor: Colors.blue,
+      unselectedItemColor: Colors.blue,
+      backgroundColor: const Color.fromARGB(255, 255, 255, 255),
+      currentIndex: 0,
+      onTap: (int index) {
+        if (index == 0) {
+          _launchURL('tel:+348766361379');
+        } else if (index == 1) {
+          _launchURL('mailto:civan@crcivan.com');
+        }
+      },
+    );
+  }
+ 
+}